Valve-reseating tool



April 7, 1925. 1,532,653

C. M. DAVISON VAIJVEv RESEATING TOQL4 Filed lNdv. 16. 1922 2,Shm1'.s-Sheo1zA 2 Patented Apr. 7, 1925.n

srares rai/'iran CLARENCE l. DAVSN, OF BALTMORE, MARYLAND, SSIGNOR TO POOLE ENGNEER- TNG AND BIAGI-EINE COMEANY, OF BALTIMORE, NLARYLAND7 A COREEORATION OF I'EARYLAND.

VALVE-R`ESEATING TOOL.

Application led November To all whom t may concern.'

lle it known that l, CLARENCE M. DAvisoN, a citizen of the United States, residing at Baltimore, in the Sta-te of Maryland7 have invented certain new and useful improvements in Valvedteseating Tools; and l do hereby declare the 'following to he a full.1 clear, and exact description of the invention, such as will enable others skilled in the art 'to which it appertains to make and use the saine.

My invention relates to tools for reseating valves. y

Among the objects or" my invention are To provide a tool for reseating valves which can he readily transported from place to place and readily adjusted in location for reseating a valve.

To rovide a tool especially suitable ior reseating a plurality oi axially aligned valve seats comprising means for aligning the reseatingl cutter with each seat.

To provide a tool for reseating valves coin prisinga cutter arbor and a feed screw acting` therewith to zguide said arhor and more sinne axially in 1ooth directions.

To provide a tool for reseating frustreconieal valve seats that are coaxial with cy-' lindrical valve ports, said vtool comprising means for axially aligning the reseating` cut ters with said ports.

Vhese and further objects or nay invention will hecoine apparent in the following specification7 reference being had to the accompanying` drawings, and the `means hy which they are eiectuated will he definitely pointed out in the claims.

ln the drawings ligure 1 is a central axial section of my improved reseating tool.

Fig. 2 is a section along the line 2-2 in Fig. 1 looking in the directions of the arrows. y

Fig. 3 is a View of the reseating tool lookine; in the direction of the arrow 3 in Fig'. l.

Fig. 4 is a partial section along' the line Llel in Fig. 1 looking in the direction of the `o is.

Qn the drawings:

5 are walls formingl part of a valve 'ng and comprising cylindrical ports 6 and 7 and rustro-conical valve seats 8 and 9.

10 is another wall formingv part ot the valve casing and comprising` a threaded hole 16, 1322. Serial No. 601,268.

11 in which the ordinary valve cap is usually threaded.

The cylindrical valver ports 6 and 7, the frustro-conical valve seats 8 and 9 and the threaded hole 11 are in axial alignment.

12 is an adapter threaded in the hole 1l and said adapter is provided with a hearing 13 and a threaded hole 14.

The portion of the adapter 12 which is threaded into the hole 11 is coaxial with the bearing 13 and threaded hole 14.

A. feed screw 15 is threadedwithin the hole lll and has a cylindrical portion which revolves within the hearing 18. 1

The adapter 12 is provided with a hep;- agonal portion 16 'for the application a wrench and with ears 17-17 between which a slot 18 is formed extending to the holelll.

il holt 19 serves to press the ears lil-17 together and thus clamp the feed screw 15. yThe feed screw 15 is'pro'vided with a flange 2O which may he made hexagonal in profile or of any other approved shape for the application of the haid or a, wrench thereto.V

The feed screw 15is provided with a hearing 21 within which the arhor 22 is revoluhly mounted. The arhor 22 is provided with a flange 23A against whichrests aiher or other composition washer 211, and another flange 25 is mounted upon said arloor in fixed angular relation thereto and retained in place hy the nut 26.

The washer 24E and flange 25 forni shoulder hearings for the arhor 22 against the ends or' the feed screw 20; consequently, said arbor can loe moved axially in both 'directions by said screw.

The axial movements of the screw 15 with reference to the adapter 12 are determined hy the flange 2O and the washer 2a, said washer h'eing` made suliiciently large do abut upon the lower end of said adapter.

Reseating cutters 27 and 28 are secured upon the arbor 22 and said cutters are revolved by the handle 29 which is secured to the iange 25. By means of the handle 29 my improved tooly may he carried.

From the foregoing it will he evident that the hearing 21 provides for the axial alignment of the cutter 28 with the port 7.

lt is also evident that if the seat S is to he in axial alignment with the port 7 and seat 9, some means must he provided for aligning the end oi the arbor 22 with the GOl port 6 and this alignment is effectuated by the following means l0 is a head `of such diameter that it will easily pass within the port 6 and said head is provided with a sleeve 3l which is revolublyi` and slidably mounted in bearings 32 and 33 which are coaxial with the cutting edges of the teeth of the cutters 27 and The head 30 is provided with radial holes in which are slidablyr mounted-the three pins said pins being of the same length. The'pins 84 are pressed against the cylindrical surface of the port 6 by the frustro-conical end 35 formed upon the lower end ofthe adjusting rod 36 which is slidably'mounted in anV axial hole inV the sleeve 31 and prevented from turning by the key 37 which contacts with the fiat suriiaee 38 formed upon therod 36.

The sleeve 3l is prevented from moving below the position shown in Fig. l by the collar 39 and the nut 40 threaded upon the end of the rod 36 serves to draw the frustro conical end 35 upwardly and thus move the pins 34 outwardly.

The 'springs 4:1 secured to the ends of the pins l2 which are mounted in the pins 21 and extend through holes 43 in the head V30, serve to move the pins Sli inwardly.

The operation of my improved tool reseatmg valves is as follows y in adapter l2 having been placed thereon,- which has a thread suitable for the threaded hole ll, the arbor and cutters are passed through said hole and said adapter is screwed into place.

Before the tool is placed in position as just described, vthenut l0 isunscrewed and the lrod 36 pressed downwardly so 'that the springs il may pull the pins inwardly. After the tool is in place'the nut el@ is then to be turned until it is felt that the pins d are in firm Contact with the walls of the port 6, thus aligning the lower end of the arbor 22 with said port.`

ltis to be noted that the feed screw lo i undercut as at 44 to reduce Vthe length o' the bearing 2l in order to permit of a ver slight lateral motion of the end of the arbor 22.

The bolt i9 is then loosened sufficiently to permit a free movement of the feed scnw l5. Said screw is moved inw rdly until by turning the handle 29 it is felt that the cut/- ters, 27 and 28 are beginning to cut.

Itis to be 'noted that my feed screw controls thel axial position of the arbor 22 in both directions; consequently, the cutters will not follow any irregularities of the seats 8 and 9, but will cut offthe high spots thereof and will bring said seats into perfect alignment lwith the ports 6 and 7.

I consider this to be a very valuable fcature of my invention because it insures correct alignment of said seats.

ation with an adapter, of a i ly threaded in said adapter and comprising a bearing, moved ialiy b .'l screw and revolubly moun in ld bA e ing, two coders on said aroor, the Y.first ter afaiacent sait screw and centered by rsaid ng with reference to the cylindrical portion of one port, the second cutter at the end of said arbor and means for centering said second cutter with reference the cylindrical portion of the other port.

in a valve reea ally aligned valve po drical portions and .e seats, the coinbination with an r and an arbor centered by said adapter with reference to the on of one uort, means for said arbor with reference to the cylindrical portion of the other port, and cutters on said arbor for reseating' Asaid seats.

3. in a valve reseating tool fortwo a i ally aligned valve ports each having cyluin drical portions and valve seats, the combination with an adapter, of a feetl screw threaded in said adapter and comprising a bearing, an arbor moved axially by said screw and revolubly mounted in said bearing compri '1g an axial hole, two cut,- ters on said arbor, the first cutter adjacent said screw and centered by said bearing with reference tothe cylindrical portion of one port, the second cutter at theend of said arbor, a head having sleeve mounted in said hole and comprisin iins for engag- 's each havingY cynn' ing the cylindrical portion of the other por@ an adju ne rod mounted in said sleeve and comprising a fi.'ustroconical portion for engaging one end'of each of'said pins, and means for moving said rod to l press the other ends of said pins against the cylindrical portion of the other port to center there with the second cut-ter.

in av valve'reseating tool, the combination with an adapter haif'inga slot therein and an arbor, of a feed screw threaded in said adapter and engaging' shoulders on said arbor to more axially, a bolt adjacent said slot for clamping said screw and a cutter on said arbor.

In testimony whereof, i affix my signa ture.

ng tool for two ari- Y 

